| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Deformation Mechanisms and Radiation Resistance of Gradient Alloys |
| Author(s) |
Zhongxia Shang, Xinghang Zhang, Brad Boyce |
| On-Site Speaker (Planned) |
Xinghang Zhang |
| Abstract Scope |
Nanostructured metallic materials exhibit high strength and good radiation resistance. While the nanoscale grains induce high strength, they also degrade tensile ductility. Here, we show that a gradient nanostructured ferritic steel, T91 alloy, exhibits simultaneous improvement in yield strength and tensile fracture strain. T91 alloy is one of the promising cladding candidates for advanced nuclear reactors. In situ tension studies coupled with electron backscattered diffraction analyses reveal intricate coordinated deformation mechanisms in the gradient structures. The outermost nanolaminate grains sustain a significant plastic strain via a profound deformation mechanism involving substantial grain reorientation. The radiation response of the gradient T91 alloys depends on misorientation angles among various types of grain boundaries. The implications for the design of gradient materials with unique mechanical behavior and radiation tolerance will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nuclear Materials, Characterization |